SU+J Lost files after a power failure

[David Demelier]

On 14.10.2013 20:08, RW wrote:
> On Mon, 14 Oct 2013 18:34:36 +0200
> David Demelier wrote:
> 
>> On 14.10.2013 14:39, RW wrote:
> 
>>> If you are having problems with data integrity you might try
>>> gjournal or zfs instead.
>>
>> Why? SU+J is enabled by default. Isn't the purpose of a journaled file
>> system to ensure that any bad shutdown will protect data?
> 
> SU+J isn't a journalled filesytem, it's a filesystem with soft-updates
> that journals information about free space so it can be recovered
> without having to go through the whole filesystem.
> 

Okay, but why the fsck didn't run by itself to detect that the journal
didn't replayed correctly (if I understanding well) to correct the issues?